mineral sequence

mineral sequence

[′min·rəl ′sē·kwəns]
(mineralogy)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Caption: Figure 10: Burial curve proposed for the Tegulines Clay and diagenetic mineral sequence. The mineral sequence including processes of dissolution, oxidation, and precipitation is detailed in function of depth for the telodiagenesis.
The required amounts of silica, alumina and alkali and alkaline- earth cations necessary for zeolite formation probably resulted from volcanic glass and primary igneous fenocrystal dissolution, although the plagioclase alteration reaction in the rock matrix, releasing Ca, could also have been responsible for this According to the defined mineral sequence, it can be deduced that a change in fluid composition occurred as temperature dropped Zeolite formation in the region studied here began with the highest Si activity in fluid and low Si/Al ratio Na zeolites and ended with the lowest Si activity in fluid and high Si/Al ratio Ca zeolites.